Life-boat.



PATENTED SEPT. 6, 1904.

R. D. MAYO.

LIFE BOAT.

APPLICATION FILED JAN. 5. 1904.

N0 MODEL.

R nbcrY-flavid/Wayo UNITED STATES Patented September 6, 1904.

PATENT OFFICE.

LIFE-BOAT.

SPECIFICATION forming part of Letters Patent No. 769,316, dated September 6, 1904.

Application filed January 5, 1904:.

To all whom it may concern:

Be it known that I, ROBERT DAVID MAYO, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and use, ful Improvements in Life-Boats, of which the following is a specification.

My invention relates to improvements in the class of life-boats described and claimed in my application, Serial No. 181,416, filed November 16, 1903; and its objects are, first, to provide two air-chambers at each end of the boat and admit air therethrough to the carriagechamber without danger of water flowing into the air-chamber,.and, second, to provide for opening the outer door to the dashboard without occupying too much space in the space between the bulkheads. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal section of the boat on the line 00 w of Fig. 2. Fig. 2 is a transverse section of the same on the line 3/ y of Fig. 1. Fig. 3 is a vertical section of the inner bulkhead and dashboards on'the line x w of Fig. 2. Fig. 4 is an elevation of the dashboard and doors, and Fig. 5 is a bottom plan of the same.

Similar letters refer to similar parts throughoutthe several views. b A represents the hull or inclosed case of the oat. 1

B is the revoluble carriage.

C is the stationary track.

D is the revoluble track, and E E are the rollers that support the carriage B.

F and F are the two bulkheads, and I is the conical wall that connects the end of the shell A at 6 with the bulkhead F, forming an airtight compartment N in each end of the boat, practically as shown in my previous application hereinbefore referred to.

In my present boat I place a bulkhead F in each end a short distance in from the bulkheads F. I place an air-tight annular wall G between these bulkheads, thus forming a second air-tight compartment N at each .end of the boat, and place air-tubes H through these compartments from and through the walls G to and through the shell A for the passage of Serial No. 187,838. (No model.)

air from the periphery of the shell into the boat without danger of any water passing through into the air-compartment N and for the passage of any water that may enter through the opening a out of the boat.

Iplace the dashboard M in the bulkheads F and hinge or otherwise adjustably secure doors J and J thereto, so that they maybe opened and closed when desired, though with this construction I prefer that the outer doors J be arranged to slide down upon a dovetailed slide or other suitable appliance, substantially as shown in Figs. 3, 4, and5, as by this means one working in the compartment between the two bulkheads can open and close this door without difficulty. In this instance I have shown the supporting-rim K securely This boat is'designed to work in all other respects exactly similar to the boat described in my former application hereinbefore referred to. e

Having thus'fully described my invention,

.what I claim as new, and desire to secure by LettersPatent of the United States, is

1. In a life-boat having a revoluble shell and a relatively revoluble carriage therein, a bulkhead near the end, a conical annular wall connecting its bulkhead with the end forming an air-compartment between it and the shell and an opening through the bulkhead and the end of the shell, a second bulkhead back of the first, an annular wall connecting the two bulkheads and forming a second air-tight compartment between the bulkheads and the shell, pipes leading therefrom through the shell, substantially as and for the purpose set forth.

2. In a life-boat a revoluble shell and a relatively revoluble carriage therein, two bulkheads at each end, an annular wall connecting the first bulkheads with the ends of the shell the shell, revoluble dashboards in the bulkheads, doors secured to said dashboards, an annular metal rini in said dashboards and doors and projecting into the bulkhead forming water-tight joints therewith, substantially as and for the purpose set forth.

Signed at Grand Rapids, Michigan, December 30, 1903.

ROBERT DAVID MAYO. In presence of- H. S. OsBoRN, ITHIEL J. CILLEY. 

